Portable food mixer



FIG. 1 is a left side elevational view of a portable food mixer showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a bottom, front and right side perspective view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a back elevational view thereof.

The broken line showing of the beaters and bowl in FIG. 4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portable food mixer, as shown and described. 